Join Date: Jan 2014
Location: South Central PA
P1511 says it was in limp mode from a fault in the throttle body.
Being as it's a 2009, there is a very good chance that your issue is with the cheap tin terminal ends in the connector at the rear of the throttle body. There are some upgraded silver plated terminal ends to correct that issue. Not big repair bill at all. But the tool to install them cost more than the labor at the dealer.
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